# physics

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A slingshot consists of a light leather cup
attached between two rubber bands. It takes
a force of 25 N to stretch the bands 1.1 cm.

a) What is the equivalent spring constant
of the rubber bands?
Answer in units of N/m

b) How much force is required to pull the cup
of the slingshot 4.0 cm from its equilibrium
position?
Answer in units of N

• physics -

a) k = 25 N/0.011 m = 2273 N/m

b) k*X= 2273 N/m * 0.040 m = 90.9 N

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